The heart of the 30 Stack is the pressure packages. These pressure packages, whether dogs, stunts, blitzes or games, will give any defensive coach a lot of flexibility in creating a defensive personality that will fit his philosophy and personnel. We have included over 100 "stunts" in this manual that can be run at the strength of an offense, openside (opposite strength), the field or the boundary, which allows this defense to meet all offensive tendencies.